Bump openpgp from 4.10.4 to 4.10.7 (#44)

Bumps [openpgp](https://github.com/openpgpjs/openpgpjs) from 4.10.4 to 4.10.7.
- [Release notes](https://github.com/openpgpjs/openpgpjs/releases)
- [Commits](https://github.com/openpgpjs/openpgpjs/compare/v4.10.4...v4.10.7)

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package.json

@@ -25,7 +25,7 @@
     "@actions/core": "^1.2.3",
     "@actions/exec": "^1.0.4",
     "addressparser": "^1.0.1",
-    "openpgp": "^4.10.4"
+    "openpgp": "^4.10.7"
   },
   "devDependencies": {
     "@types/jest": "^26.0.0",